/* List lines of source files for GDB, the GNU debugger.
- Copyright (C) 1986, 1987, 1988 Free Software Foundation, Inc.
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
-
-#include <stdio.h>
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/file.h>
+ Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
+ 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
+ Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
#include "defs.h"
-#include "initialize.h"
#include "symtab.h"
+#include "expression.h"
+#include "language.h"
+#include "command.h"
+#include "source.h"
+#include "gdbcmd.h"
+#include "frame.h"
+#include "value.h"
+
+#include <sys/types.h>
+#include "gdb_string.h"
+#include "gdb_stat.h"
+#include <fcntl.h>
+#include "gdbcore.h"
+#include "gdb_regex.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "annotate.h"
+#include "gdbtypes.h"
+#include "linespec.h"
+#include "filenames.h" /* for DOSish file names */
+#include "completer.h"
+#include "ui-out.h"
+
+#ifdef CRLF_SOURCE_FILES
+
+/* Define CRLF_SOURCE_FILES in an xm-*.h file if source files on the
+ host use \r\n rather than just \n. Defining CRLF_SOURCE_FILES is
+ much faster than defining LSEEK_NOT_LINEAR. */
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#define OPEN_MODE (O_RDONLY | O_BINARY)
+#define FDOPEN_MODE FOPEN_RB
+
+#else /* ! defined (CRLF_SOURCE_FILES) */
+
+#define OPEN_MODE O_RDONLY
+#define FDOPEN_MODE FOPEN_RT
+
+#endif /* ! defined (CRLF_SOURCE_FILES) */
+
+/* Prototypes for exported functions. */
+
+void _initialize_source (void);
+
+/* Prototypes for local functions. */
+
+static int get_filename_and_charpos (struct symtab *, char **);
+
+static void reverse_search_command (char *, int);
+
+static void forward_search_command (char *, int);
+
+static void line_info (char *, int);
+
+static void list_command (char *, int);
+
+static void ambiguous_line_spec (struct symtabs_and_lines *);
+
+static void source_info (char *, int);
+
+static void show_directories (char *, int);
/* Path of directories to search for source files.
Same format as the PATH environment variable's value. */
-static char *source_path;
+char *source_path;
/* Symtab of default file for listing lines of. */
int current_source_line;
+/* Default number of lines to print with commands like "list".
+ This is based on guessing how many long (i.e. more than chars_per_line
+ characters) lines there will be. To be completely correct, "list"
+ and friends should be rewritten to count characters and see where
+ things are wrapping, but that would be a fair amount of work. */
+
+int lines_to_list = 10;
+
/* Line number of last line printed. Default for various commands.
current_source_line is usually, but not always, the same as this. */
static int first_line_listed;
-START_FILE
+/* Saves the name of the last source file visited and a possible error code.
+ Used to prevent repeating annoying "No such file or directories" msgs */
+
+static struct symtab *last_source_visited = NULL;
+static int last_source_error = 0;
\f
-/* Set the source file default for the "list" command,
- specifying a symtab. */
+
+/* Set the source file default for the "list" command to be S.
+
+ If S is NULL, and we don't have a default, find one. This
+ should only be called when the user actually tries to use the
+ default, since we produce an error if we can't find a reasonable
+ default. Also, since this can cause symbols to be read, doing it
+ before we need to would make things slower than necessary. */
void
-select_source_symtab (s)
- register struct symtab *s;
+select_source_symtab (register struct symtab *s)
{
+ struct symtabs_and_lines sals;
+ struct symtab_and_line sal;
+ struct partial_symtab *ps;
+ struct partial_symtab *cs_pst = 0;
+ struct objfile *ofp;
+
if (s)
{
- struct symtabs_and_lines sals;
- struct symtab_and_line sal;
+ current_source_symtab = s;
+ current_source_line = 1;
+ return;
+ }
+
+ if (current_source_symtab)
+ return;
+
+ /* Make the default place to list be the function `main'
+ if one exists. */
+ if (lookup_symbol (main_name (), 0, VAR_NAMESPACE, 0, NULL))
+ {
+ sals = decode_line_spec (main_name (), 1);
+ sal = sals.sals[0];
+ xfree (sals.sals);
+ current_source_symtab = sal.symtab;
+ current_source_line = max (sal.line - (lines_to_list - 1), 1);
+ if (current_source_symtab)
+ return;
+ }
+
+ /* All right; find the last file in the symtab list (ignoring .h's). */
- /* Make the default place to list be the function `main'
- if one exists. */
- if (lookup_symbol ("main", 0, VAR_NAMESPACE))
+ current_source_line = 1;
+
+ for (ofp = object_files; ofp != NULL; ofp = ofp->next)
+ {
+ for (s = ofp->symtabs; s; s = s->next)
{
- sals = decode_line_spec ("main", 1);
- sal = sals.sals[0];
- free (sals.sals);
- current_source_symtab = sal.symtab;
- current_source_line = sal.line - 9;
- return;
+ char *name = s->filename;
+ int len = strlen (name);
+ if (!(len > 2 && (STREQ (&name[len - 2], ".h"))))
+ {
+ current_source_symtab = s;
+ }
}
+ }
+ if (current_source_symtab)
+ return;
- /* If there is no `main', use the last symtab in the list,
- which is actually the first found in the file's symbol table.
- But ignore .h files. */
- do
+ /* Howabout the partial symbol tables? */
+
+ for (ofp = object_files; ofp != NULL; ofp = ofp->next)
+ {
+ for (ps = ofp->psymtabs; ps != NULL; ps = ps->next)
{
- char *name = s->filename;
+ char *name = ps->filename;
int len = strlen (name);
- if (! (len > 2 && !strcmp (&name[len - 2], ".h")))
- current_source_symtab = s;
- s = s->next;
+ if (!(len > 2 && (STREQ (&name[len - 2], ".h"))))
+ {
+ cs_pst = ps;
+ }
+ }
+ }
+ if (cs_pst)
+ {
+ if (cs_pst->readin)
+ {
+ internal_error (__FILE__, __LINE__,
+ "select_source_symtab: "
+ "readin pst found and no symtabs.");
+ }
+ else
+ {
+ current_source_symtab = PSYMTAB_TO_SYMTAB (cs_pst);
}
- while (s);
- current_source_line = 1;
}
+ if (current_source_symtab)
+ return;
+
+ error ("Can't find a default source file");
}
\f
static void
-directories_info ()
+show_directories (char *ignore, int from_tty)
{
- printf ("Source directories searched: %s\n", source_path);
+ puts_filtered ("Source directories searched: ");
+ puts_filtered (source_path);
+ puts_filtered ("\n");
}
-static void
-init_source_path ()
+/* Forget what we learned about line positions in source files, and
+ which directories contain them; must check again now since files
+ may be found in a different directory now. */
+
+void
+forget_cached_source_info (void)
{
register struct symtab *s;
- char wd[MAXPATHLEN];
- if (getwd (wd) == NULL)
- perror_with_name ("getwd");
+ register struct objfile *objfile;
+ struct partial_symtab *pst;
- source_path = savestring (wd, strlen (wd));
+ for (objfile = object_files; objfile != NULL; objfile = objfile->next)
+ {
+ for (s = objfile->symtabs; s != NULL; s = s->next)
+ {
+ if (s->line_charpos != NULL)
+ {
+ xmfree (objfile->md, s->line_charpos);
+ s->line_charpos = NULL;
+ }
+ if (s->fullname != NULL)
+ {
+ xmfree (objfile->md, s->fullname);
+ s->fullname = NULL;
+ }
+ }
- /* Forget what we learned about line positions in source files;
- must check again now since files may be found in
- a different directory now. */
- for (s = symtab_list; s; s = s->next)
- if (s->line_charpos != 0)
+ ALL_OBJFILE_PSYMTABS (objfile, pst)
{
- free (s->line_charpos);
- s->line_charpos = 0;
+ if (pst->fullname != NULL)
+ {
+ xfree (pst->fullname);
+ pst->fullname = NULL;
+ }
}
+ }
}
void
-directory_command (dirname, from_tty)
- char *dirname;
- int from_tty;
+init_source_path (void)
{
- char *old = source_path;
+ char buf[20];
+
+ sprintf (buf, "$cdir%c$cwd", DIRNAME_SEPARATOR);
+ source_path = xstrdup (buf);
+ forget_cached_source_info ();
+}
- char wd[MAXPATHLEN];
- if (getwd (wd) == NULL)
- perror_with_name ("getwd");
+/* Add zero or more directories to the front of the source path. */
+void
+directory_command (char *dirname, int from_tty)
+{
+ dont_repeat ();
+ /* FIXME, this goes to "delete dir"... */
if (dirname == 0)
{
- if (query ("Reinitialize source path to %s? ", wd))
+ if (from_tty && query ("Reinitialize source path to empty? "))
{
+ xfree (source_path);
init_source_path ();
- free (old);
}
}
else
{
+ mod_path (dirname, &source_path);
+ last_source_visited = NULL;
+ }
+ if (from_tty)
+ show_directories ((char *) 0, from_tty);
+ forget_cached_source_info ();
+}
+
+/* Add zero or more directories to the front of an arbitrary path. */
+
+void
+mod_path (char *dirname, char **which_path)
+{
+ char *old = *which_path;
+ int prefix = 0;
+
+ if (dirname == 0)
+ return;
+
+ dirname = xstrdup (dirname);
+ make_cleanup (xfree, dirname);
+
+ do
+ {
+ char *name = dirname;
+ register char *p;
struct stat st;
- register int len = strlen (dirname);
- register char *tem;
- extern char *index ();
- if (index (dirname, ':'))
- error ("Please add one directory at a time to the source path.");
- if (dirname[len - 1] == '/')
- /* Sigh. "foo/" => "foo" */
- dirname[--len] == '\0';
+ {
+ char *separator = strchr (name, DIRNAME_SEPARATOR);
+ char *space = strchr (name, ' ');
+ char *tab = strchr (name, '\t');
+
+ if (separator == 0 && space == 0 && tab == 0)
+ p = dirname = name + strlen (name);
+ else
+ {
+ p = 0;
+ if (separator != 0 && (p == 0 || separator < p))
+ p = separator;
+ if (space != 0 && (p == 0 || space < p))
+ p = space;
+ if (tab != 0 && (p == 0 || tab < p))
+ p = tab;
+ dirname = p + 1;
+ while (*dirname == DIRNAME_SEPARATOR
+ || *dirname == ' '
+ || *dirname == '\t')
+ ++dirname;
+ }
+ }
- while (dirname[len - 1] == '.')
+ if (!(IS_DIR_SEPARATOR (*name) && p <= name + 1) /* "/" */
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+ /* On MS-DOS and MS-Windows, h:\ is different from h: */
+ && !(p == name + 3 && name[1] == ':') /* "d:/" */
+#endif
+ && IS_DIR_SEPARATOR (p[-1]))
+ /* Sigh. "foo/" => "foo" */
+ --p;
+ *p = '\0';
+
+ while (p > name && p[-1] == '.')
{
- if (len == 1)
+ if (p - name == 1)
{
- /* "." => getwd () */
- dirname = wd;
+ /* "." => getwd (). */
+ name = current_directory;
goto append;
}
- else if (dirname[len - 2] == '/')
+ else if (p > name + 1 && IS_DIR_SEPARATOR (p[-2]))
{
- if (len == 2)
+ if (p - name == 2)
{
- /* "/." => "/" */
- dirname[--len] = '\0';
+ /* "/." => "/". */
+ *--p = '\0';
goto append;
}
else
{
- /* "...foo/." => "...foo" */
- dirname[len -= 2] = '\0';
+ /* "...foo/." => "...foo". */
+ p -= 2;
+ *p = '\0';
continue;
}
}
- break;
+ else
+ break;
}
- if (dirname[0] != '/')
- dirname = concat (wd, "/", dirname);
+ if (name[0] == '~')
+ name = tilde_expand (name);
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+ else if (IS_ABSOLUTE_PATH (name) && p == name + 2) /* "d:" => "d:." */
+ name = concat (name, ".", NULL);
+#endif
+ else if (!IS_ABSOLUTE_PATH (name) && name[0] != '$')
+ name = concat (current_directory, SLASH_STRING, name, NULL);
else
- dirname = savestring (dirname, len);
- make_cleanup (free, dirname);
-
- if (stat (dirname, &st) < 0)
- perror_with_name (dirname);
- if ((st.st_mode & S_IFMT) != S_IFDIR)
- error ("%s is not a directory.", dirname);
+ name = savestring (name, p - name);
+ make_cleanup (xfree, name);
- append:
- len = strlen (dirname);
- tem = source_path;
- while (1)
+ /* Unless it's a variable, check existence. */
+ if (name[0] != '$')
{
- if (!strncmp (tem, dirname, len)
- && (tem[len] == '\0' || tem[len] == ':'))
- {
- printf ("\"%s\" is already in the source path.\n",
- dirname);
- break;
- }
- tem = index (tem, ':');
- if (tem)
- tem++;
- else
+ /* These are warnings, not errors, since we don't want a
+ non-existent directory in a .gdbinit file to stop processing
+ of the .gdbinit file.
+
+ Whether they get added to the path is more debatable. Current
+ answer is yes, in case the user wants to go make the directory
+ or whatever. If the directory continues to not exist/not be
+ a directory/etc, then having them in the path should be
+ harmless. */
+ if (stat (name, &st) < 0)
{
- source_path = concat (old, ":", dirname);
- free (old);
- break;
+ int save_errno = errno;
+ fprintf_unfiltered (gdb_stderr, "Warning: ");
+ print_sys_errmsg (name, save_errno);
}
+ else if ((st.st_mode & S_IFMT) != S_IFDIR)
+ warning ("%s is not a directory.", name);
}
- if (from_tty)
- directories_info ();
+
+ append:
+ {
+ register unsigned int len = strlen (name);
+
+ p = *which_path;
+ while (1)
+ {
+ /* FIXME: strncmp loses in interesting ways on MS-DOS and
+ MS-Windows because of case-insensitivity and two different
+ but functionally identical slash characters. We need a
+ special filesystem-dependent file-name comparison function.
+
+ Actually, even on Unix I would use realpath() or its work-
+ alike before comparing. Then all the code above which
+ removes excess slashes and dots could simply go away. */
+ if (!strncmp (p, name, len)
+ && (p[len] == '\0' || p[len] == DIRNAME_SEPARATOR))
+ {
+ /* Found it in the search path, remove old copy */
+ if (p > *which_path)
+ p--; /* Back over leading separator */
+ if (prefix > p - *which_path)
+ goto skip_dup; /* Same dir twice in one cmd */
+ strcpy (p, &p[len + 1]); /* Copy from next \0 or : */
+ }
+ p = strchr (p, DIRNAME_SEPARATOR);
+ if (p != 0)
+ ++p;
+ else
+ break;
+ }
+ if (p == 0)
+ {
+ char tinybuf[2];
+
+ tinybuf[0] = DIRNAME_SEPARATOR;
+ tinybuf[1] = '\0';
+
+ /* If we have already tacked on a name(s) in this command, be sure they stay on the front as we tack on some more. */
+ if (prefix)
+ {
+ char *temp, c;
+
+ c = old[prefix];
+ old[prefix] = '\0';
+ temp = concat (old, tinybuf, name, NULL);
+ old[prefix] = c;
+ *which_path = concat (temp, "", &old[prefix], NULL);
+ prefix = strlen (temp);
+ xfree (temp);
+ }
+ else
+ {
+ *which_path = concat (name, (old[0] ? tinybuf : old), old, NULL);
+ prefix = strlen (name);
+ }
+ xfree (old);
+ old = *which_path;
+ }
+ }
+ skip_dup:;
+ }
+ while (*dirname != '\0');
+}
+
+
+static void
+source_info (char *ignore, int from_tty)
+{
+ register struct symtab *s = current_source_symtab;
+
+ if (!s)
+ {
+ printf_filtered ("No current source file.\n");
+ return;
}
+ printf_filtered ("Current source file is %s\n", s->filename);
+ if (s->dirname)
+ printf_filtered ("Compilation directory is %s\n", s->dirname);
+ if (s->fullname)
+ printf_filtered ("Located in %s\n", s->fullname);
+ if (s->nlines)
+ printf_filtered ("Contains %d line%s.\n", s->nlines,
+ s->nlines == 1 ? "" : "s");
+
+ printf_filtered ("Source language is %s.\n", language_str (s->language));
+ printf_filtered ("Compiled with %s debugging format.\n", s->debugformat);
+ printf_filtered ("%s preprocessor macro info.\n",
+ s->macro_table ? "Includes" : "Does not include");
}
\f
-/* Open a file named STRING, searching path PATH (dir names sep by colons)
+
+/* Return True if the file NAME exists and is a regular file */
+static int
+is_regular_file (const char *name)
+{
+ struct stat st;
+ const int status = stat (name, &st);
+
+ /* Stat should never fail except when the file does not exist.
+ If stat fails, analyze the source of error and return True
+ unless the file does not exist, to avoid returning false results
+ on obscure systems where stat does not work as expected.
+ */
+ if (status != 0)
+ return (errno != ENOENT);
+
+ return S_ISREG (st.st_mode);
+}
+
+/* Open a file named STRING, searching path PATH (dir names sep by some char)
using mode MODE and protection bits PROT in the calls to open.
+
If TRY_CWD_FIRST, try to open ./STRING before searching PATH.
- (ie pretend the first element of PATH is ".")
- If FILENAMED_OPENED is non-null, set it to a newly allocated string naming
- the actual file opened (this string will always start with a "/"
+ (ie pretend the first element of PATH is "."). This also indicates
+ that a slash in STRING disables searching of the path (this is
+ so that "exec-file ./foo" or "symbol-file ./foo" insures that you
+ get that particular version of foo or an error message).
+
+ If FILENAME_OPENED is non-null, set it to a newly allocated string naming
+ the actual file opened (this string will always start with a "/"). We
+ have to take special pains to avoid doubling the "/" between the directory
+ and the file, sigh! Emacs gets confuzzed by this when we print the
+ source file name!!!
If a file is found, return the descriptor.
Otherwise, return -1, with errno set for the last name we tried to open. */
/* >>>> This should only allow files of certain types,
>>>> eg executable, non-directory */
int
-openp (path, try_cwd_first, string, mode, prot, filename_opened)
- char *path;
- int try_cwd_first;
- char *string;
- int mode;
- int prot;
- char **filename_opened;
+openp (const char *path, int try_cwd_first, const char *string,
+ int mode, int prot,
+ char **filename_opened)
{
register int fd;
register char *filename;
- register char *p, *p1;
+ const char *p;
+ const char *p1;
register int len;
+ int alloclen;
- /* ./foo => foo */
- while (string[0] == '.' && string[1] == '/')
- string += 2;
+ if (!path)
+ path = ".";
+
+#if defined(_WIN32) || defined(__CYGWIN__)
+ mode |= O_BINARY;
+#endif
- if (try_cwd_first || string[0] == '/')
+ if ((try_cwd_first || IS_ABSOLUTE_PATH (string)) && is_regular_file (string))
{
- filename = string;
+ int i;
+ filename = alloca (strlen (string) + 1);
+ strcpy (filename, string);
fd = open (filename, mode, prot);
- if (fd >= 0 || string[0] == '/')
+ if (fd >= 0)
goto done;
+ for (i = 0; string[i]; i++)
+ if (IS_DIR_SEPARATOR (string[i]))
+ goto done;
}
- filename = (char *) alloca (strlen (path) + strlen (string) + 2);
+ /* ./foo => foo */
+ while (string[0] == '.' && IS_DIR_SEPARATOR (string[1]))
+ string += 2;
+
+ alloclen = strlen (path) + strlen (string) + 2;
+ filename = alloca (alloclen);
fd = -1;
for (p = path; p; p = p1 ? p1 + 1 : 0)
{
- p1 = (char *) index (p, ':');
+ p1 = strchr (p, DIRNAME_SEPARATOR);
if (p1)
len = p1 - p;
else
len = strlen (p);
- strncpy (filename, p, len);
- filename[len] = 0;
- strcat (filename, "/");
+ if (len == 4 && p[0] == '$' && p[1] == 'c'
+ && p[2] == 'w' && p[3] == 'd')
+ {
+ /* Name is $cwd -- insert current directory name instead. */
+ int newlen;
+
+ /* First, realloc the filename buffer if too short. */
+ len = strlen (current_directory);
+ newlen = len + strlen (string) + 2;
+ if (newlen > alloclen)
+ {
+ alloclen = newlen;
+ filename = alloca (alloclen);
+ }
+ strcpy (filename, current_directory);
+ }
+ else
+ {
+ /* Normal file name in path -- just use it. */
+ strncpy (filename, p, len);
+ filename[len] = 0;
+ }
+
+ /* Remove trailing slashes */
+ while (len > 0 && IS_DIR_SEPARATOR (filename[len - 1]))
+ filename[--len] = 0;
+
+ strcat (filename + len, SLASH_STRING);
strcat (filename, string);
- fd = open (filename, mode, prot);
- if (fd >= 0) break;
+ if (is_regular_file (filename))
+ {
+ fd = open (filename, mode);
+ if (fd >= 0)
+ break;
+ }
}
- done:
+done:
if (filename_opened)
- if (fd < 0)
- *filename_opened = (char *) 0;
- else if (filename[0] == '/')
- *filename_opened = savestring (filename, strlen (filename));
- else
- {
- *filename_opened = concat (current_directory, "/", filename);
- }
+ {
+ /* If a file was opened, canonicalize its filename. Use xfullpath
+ rather than gdb_realpath to avoid resolving the basename part
+ of filenames when the associated file is a symbolic link. This
+ fixes a potential inconsistency between the filenames known to
+ GDB and the filenames it prints in the annotations. */
+ if (fd < 0)
+ *filename_opened = NULL;
+ else if (IS_ABSOLUTE_PATH (filename))
+ *filename_opened = xfullpath (filename);
+ else
+ {
+ /* Beware the // my son, the Emacs barfs, the botch that catch... */
+
+ char *f = concat (current_directory,
+ IS_DIR_SEPARATOR (current_directory[strlen (current_directory) - 1])
+ ? "" : SLASH_STRING,
+ filename, NULL);
+ *filename_opened = xfullpath (f);
+ xfree (f);
+ }
+ }
return fd;
}
+
+
+/* This is essentially a convenience, for clients that want the behaviour
+ of openp, using source_path, but that really don't want the file to be
+ opened but want instead just to know what the full pathname is (as
+ qualified against source_path).
+
+ The current working directory is searched first.
+
+ If the file was found, this function returns 1, and FULL_PATHNAME is
+ set to the fully-qualified pathname.
+
+ Else, this functions returns 0, and FULL_PATHNAME is set to NULL.
+ */
+int
+source_full_path_of (char *filename, char **full_pathname)
+{
+ int fd;
+
+ fd = openp (source_path, 1, filename, O_RDONLY, 0, full_pathname);
+ if (fd < 0)
+ {
+ *full_pathname = NULL;
+ return 0;
+ }
+
+ close (fd);
+ return 1;
+}
+
+
+/* Open a source file given a symtab S. Returns a file descriptor or
+ negative number for error. */
+
+int
+open_source_file (struct symtab *s)
+{
+ char *path = source_path;
+ const char *p;
+ int result;
+ char *fullname;
+
+ /* Quick way out if we already know its full name */
+ if (s->fullname)
+ {
+ result = open (s->fullname, OPEN_MODE);
+ if (result >= 0)
+ return result;
+ /* Didn't work -- free old one, try again. */
+ xmfree (s->objfile->md, s->fullname);
+ s->fullname = NULL;
+ }
+
+ if (s->dirname != NULL)
+ {
+ /* Replace a path entry of $cdir with the compilation directory name */
+#define cdir_len 5
+ /* We cast strstr's result in case an ANSIhole has made it const,
+ which produces a "required warning" when assigned to a nonconst. */
+ p = (char *) strstr (source_path, "$cdir");
+ if (p && (p == path || p[-1] == DIRNAME_SEPARATOR)
+ && (p[cdir_len] == DIRNAME_SEPARATOR || p[cdir_len] == '\0'))
+ {
+ int len;
+
+ path = (char *)
+ alloca (strlen (source_path) + 1 + strlen (s->dirname) + 1);
+ len = p - source_path;
+ strncpy (path, source_path, len); /* Before $cdir */
+ strcpy (path + len, s->dirname); /* new stuff */
+ strcat (path + len, source_path + len + cdir_len); /* After $cdir */
+ }
+ }
+
+ result = openp (path, 0, s->filename, OPEN_MODE, 0, &s->fullname);
+ if (result < 0)
+ {
+ /* Didn't work. Try using just the basename. */
+ p = lbasename (s->filename);
+ if (p != s->filename)
+ result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname);
+ }
+
+ if (result >= 0)
+ {
+ fullname = s->fullname;
+ s->fullname = mstrsave (s->objfile->md, s->fullname);
+ xfree (fullname);
+ }
+ return result;
+}
+
+/* Return the path to the source file associated with symtab. Returns NULL
+ if no symtab. */
+
+char *
+symtab_to_filename (struct symtab *s)
+{
+ int fd;
+
+ if (!s)
+ return NULL;
+
+ /* If we've seen the file before, just return fullname. */
+
+ if (s->fullname)
+ return s->fullname;
+
+ /* Try opening the file to setup fullname */
+
+ fd = open_source_file (s);
+ if (fd < 0)
+ return s->filename; /* File not found. Just use short name */
+
+ /* Found the file. Cleanup and return the full name */
+
+ close (fd);
+ return s->fullname;
+}
\f
+
/* Create and initialize the table S->line_charpos that records
the positions of the lines in the source file, which is assumed
to be open on descriptor DESC.
All set S->nlines to the number of such lines. */
-static void
-find_source_lines (s, desc)
- struct symtab *s;
- int desc;
+void
+find_source_lines (struct symtab *s, int desc)
{
struct stat st;
register char *data, *p, *end;
int nlines = 0;
int lines_allocated = 1000;
- int *line_charpos = (int *) xmalloc (lines_allocated * sizeof (int));
- extern int exec_mtime;
-
- fstat (desc, &st);
- if (get_exec_file () != 0 && exec_mtime < st.st_mtime)
- printf ("Source file is more recent than executable.\n");
-
- data = (char *) alloca (st.st_size);
- myread (desc, data, st.st_size);
- end = data + st.st_size;
- p = data;
- line_charpos[0] = 0;
- nlines = 1;
- while (p != end)
- {
- if (*p++ == '\n')
- {
- if (nlines == lines_allocated)
- line_charpos = (int *) xrealloc (line_charpos,
- sizeof (int) * (lines_allocated *= 2));
- line_charpos[nlines++] = p - data;
- }
+ int *line_charpos;
+ long mtime = 0;
+ int size;
+
+ line_charpos = (int *) xmmalloc (s->objfile->md,
+ lines_allocated * sizeof (int));
+ if (fstat (desc, &st) < 0)
+ perror_with_name (s->filename);
+
+ if (s && s->objfile && s->objfile->obfd)
+ mtime = bfd_get_mtime (s->objfile->obfd);
+ else if (exec_bfd)
+ mtime = bfd_get_mtime (exec_bfd);
+
+ if (mtime && mtime < st.st_mtime)
+ {
+ warning ("Source file is more recent than executable.\n");
}
+
+#ifdef LSEEK_NOT_LINEAR
+ {
+ char c;
+
+ /* Have to read it byte by byte to find out where the chars live */
+
+ line_charpos[0] = lseek (desc, 0, SEEK_CUR);
+ nlines = 1;
+ while (myread (desc, &c, 1) > 0)
+ {
+ if (c == '\n')
+ {
+ if (nlines == lines_allocated)
+ {
+ lines_allocated *= 2;
+ line_charpos =
+ (int *) xmrealloc (s->objfile->md, (char *) line_charpos,
+ sizeof (int) * lines_allocated);
+ }
+ line_charpos[nlines++] = lseek (desc, 0, SEEK_CUR);
+ }
+ }
+ }
+#else /* lseek linear. */
+ {
+ struct cleanup *old_cleanups;
+
+ /* st_size might be a large type, but we only support source files whose
+ size fits in an int. */
+ size = (int) st.st_size;
+
+ /* Use malloc, not alloca, because this may be pretty large, and we may
+ run into various kinds of limits on stack size. */
+ data = (char *) xmalloc (size);
+ old_cleanups = make_cleanup (xfree, data);
+
+ /* Reassign `size' to result of read for systems where \r\n -> \n. */
+ size = myread (desc, data, size);
+ if (size < 0)
+ perror_with_name (s->filename);
+ end = data + size;
+ p = data;
+ line_charpos[0] = 0;
+ nlines = 1;
+ while (p != end)
+ {
+ if (*p++ == '\n'
+ /* A newline at the end does not start a new line. */
+ && p != end)
+ {
+ if (nlines == lines_allocated)
+ {
+ lines_allocated *= 2;
+ line_charpos =
+ (int *) xmrealloc (s->objfile->md, (char *) line_charpos,
+ sizeof (int) * lines_allocated);
+ }
+ line_charpos[nlines++] = p - data;
+ }
+ }
+ do_cleanups (old_cleanups);
+ }
+#endif /* lseek linear. */
s->nlines = nlines;
- s->line_charpos = (int *) xrealloc (line_charpos, nlines * sizeof (int));
+ s->line_charpos =
+ (int *) xmrealloc (s->objfile->md, (char *) line_charpos,
+ nlines * sizeof (int));
+
}
/* Return the character position of a line LINE in symtab S.
Return 0 if anything is invalid. */
+#if 0 /* Currently unused */
+
int
-source_line_charpos (s, line)
- struct symtab *s;
- int line;
+source_line_charpos (struct symtab *s, int line)
{
- if (!s) return 0;
- if (!s->line_charpos || line <= 0) return 0;
+ if (!s)
+ return 0;
+ if (!s->line_charpos || line <= 0)
+ return 0;
if (line > s->nlines)
line = s->nlines;
return s->line_charpos[line - 1];
/* Return the line number of character position POS in symtab S. */
int
-source_charpos_line (s, chr)
- register struct symtab *s;
- register int chr;
+source_charpos_line (register struct symtab *s, register int chr)
{
register int line = 0;
register int *lnp;
-
- if (s == 0 || s->line_charpos == 0) return 0;
+
+ if (s == 0 || s->line_charpos == 0)
+ return 0;
lnp = s->line_charpos;
/* Files are usually short, so sequential search is Ok */
- while (line < s->nlines && *lnp <= chr)
+ while (line < s->nlines && *lnp <= chr)
{
line++;
lnp++;
line = s->nlines;
return line;
}
+
+#endif /* 0 */
\f
+
/* Get full pathname and line number positions for a symtab.
Return nonzero if line numbers may have changed.
Set *FULLNAME to actual name of the file as found by `openp',
or to 0 if the file is not found. */
-int
-get_filename_and_charpos (s, line, fullname)
- struct symtab *s;
- int line;
- char **fullname;
+static int
+get_filename_and_charpos (struct symtab *s, char **fullname)
{
register int desc, linenums_changed = 0;
-
- desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname);
+
+ desc = open_source_file (s);
if (desc < 0)
{
if (fullname)
*fullname = NULL;
return 0;
- }
+ }
if (fullname)
*fullname = s->fullname;
- if (s->line_charpos == 0) linenums_changed = 1;
- if (linenums_changed) find_source_lines (s, desc);
+ if (s->line_charpos == 0)
+ linenums_changed = 1;
+ if (linenums_changed)
+ find_source_lines (s, desc);
close (desc);
return linenums_changed;
}
The text starts with two Ctrl-z so that the Emacs-GDB interface
can easily find it.
+ MID_STATEMENT is nonzero if the PC is not at the beginning of that line.
+
Return 1 if successful, 0 if could not find the file. */
int
-identify_source_line (s, line)
- struct symtab *s;
- int line;
+identify_source_line (struct symtab *s, int line, int mid_statement,
+ CORE_ADDR pc)
{
if (s->line_charpos == 0)
- get_filename_and_charpos (s, line, 0);
+ get_filename_and_charpos (s, (char **) NULL);
if (s->fullname == 0)
return 0;
- printf ("\032\032%s:%d:%d\n", s->fullname, line, s->line_charpos[line - 1]);
+ if (line > s->nlines)
+ /* Don't index off the end of the line_charpos array. */
+ return 0;
+ annotate_source (s->fullname, line, s->line_charpos[line - 1],
+ mid_statement, pc);
+
+ current_source_line = line;
+ first_line_listed = line;
+ last_line_listed = line;
+ current_source_symtab = s;
return 1;
}
\f
+
/* Print source lines from the file of symtab S,
- starting with line number LINE and stopping before line number STOPLINE. */
+ starting with line number LINE and stopping before line number STOPLINE. */
-void
-print_source_lines (s, line, stopline)
- struct symtab *s;
- int line, stopline;
+static void print_source_lines_base (struct symtab *s, int line, int stopline,
+ int noerror);
+static void
+print_source_lines_base (struct symtab *s, int line, int stopline, int noerror)
{
register int c;
register int desc;
register FILE *stream;
int nlines = stopline - line;
- desc = openp (source_path, 0, s->filename, O_RDONLY, 0, &s->fullname);
+ /* Regardless of whether we can open the file, set current_source_symtab. */
+ current_source_symtab = s;
+ current_source_line = line;
+ first_line_listed = line;
+
+ /* If printing of source lines is disabled, just print file and line number */
+ if (ui_out_test_flags (uiout, ui_source_list))
+ {
+ /* Only prints "No such file or directory" once */
+ if ((s != last_source_visited) || (!last_source_error))
+ {
+ last_source_visited = s;
+ desc = open_source_file (s);
+ }
+ else
+ {
+ desc = last_source_error;
+ noerror = 1;
+ }
+ }
+ else
+ {
+ desc = -1;
+ noerror = 1;
+ }
+
if (desc < 0)
- perror_with_name (s->filename);
+ {
+ last_source_error = desc;
+
+ if (!noerror)
+ {
+ char *name = alloca (strlen (s->filename) + 100);
+ sprintf (name, "%d\t%s", line, s->filename);
+ print_sys_errmsg (name, errno);
+ }
+ else
+ ui_out_field_int (uiout, "line", line);
+ ui_out_text (uiout, "\tin ");
+ ui_out_field_string (uiout, "file", s->filename);
+ ui_out_text (uiout, "\n");
+
+ return;
+ }
+
+ last_source_error = 0;
if (s->line_charpos == 0)
find_source_lines (s, desc);
- if (line < 1 || line >= s->nlines)
+ if (line < 1 || line > s->nlines)
{
close (desc);
- error ("Line number out of range; %s has %d lines.",
- s->filename, s->nlines);
+ error ("Line number %d out of range; %s has %d lines.",
+ line, s->filename, s->nlines);
}
if (lseek (desc, s->line_charpos[line - 1], 0) < 0)
perror_with_name (s->filename);
}
- current_source_symtab = s;
- current_source_line = line;
- first_line_listed = line;
-
- stream = fdopen (desc, "r");
+ stream = fdopen (desc, FDOPEN_MODE);
clearerr (stream);
while (nlines-- > 0)
{
+ char buf[20];
+
c = fgetc (stream);
- if (c == EOF) break;
+ if (c == EOF)
+ break;
last_line_listed = current_source_line;
- printf ("%d\t", current_source_line++);
+ sprintf (buf, "%d\t", current_source_line++);
+ ui_out_text (uiout, buf);
do
{
- if (c < 040 && c != '\t' && c != '\n')
+ if (c < 040 && c != '\t' && c != '\n' && c != '\r')
{
- fputc ('^', stdout);
- fputc (c + 0100, stdout);
+ sprintf (buf, "^%c", c + 0100);
+ ui_out_text (uiout, buf);
}
else if (c == 0177)
- printf ("^?");
+ ui_out_text (uiout, "^?");
+#ifdef CRLF_SOURCE_FILES
+ else if (c == '\r')
+ {
+ /* Skip a \r character, but only before a \n. */
+ int c1 = fgetc (stream);
+
+ if (c1 != '\n')
+ printf_filtered ("^%c", c + 0100);
+ if (c1 != EOF)
+ ungetc (c1, stream);
+ }
+#endif
else
- fputc (c, stdout);
- } while (c != '\n' && (c = fgetc (stream)) >= 0);
+ {
+ sprintf (buf, "%c", c);
+ ui_out_text (uiout, buf);
+ }
+ }
+ while (c != '\n' && (c = fgetc (stream)) >= 0);
}
fclose (stream);
}
\f
+/* Show source lines from the file of symtab S, starting with line
+ number LINE and stopping before line number STOPLINE. If this is the
+ not the command line version, then the source is shown in the source
+ window otherwise it is simply printed */
+
+void
+print_source_lines (struct symtab *s, int line, int stopline, int noerror)
+{
+ print_source_lines_base (s, line, stopline, noerror);
+}
+\f
+
+
+/* Print a list of files and line numbers which a user may choose from
+ in order to list a function which was specified ambiguously (as with
+ `list classname::overloadedfuncname', for example). The vector in
+ SALS provides the filenames and line numbers. */
+
+static void
+ambiguous_line_spec (struct symtabs_and_lines *sals)
+{
+ int i;
+
+ for (i = 0; i < sals->nelts; ++i)
+ printf_filtered ("file: \"%s\", line number: %d\n",
+ sals->sals[i].symtab->filename, sals->sals[i].line);
+}
+
static void
-list_command (arg, from_tty)
- char *arg;
- int from_tty;
+list_command (char *arg, int from_tty)
{
struct symtabs_and_lines sals, sals_end;
struct symtab_and_line sal, sal_end;
int linenum_beg = 0;
char *p;
- if (symtab_list == 0)
- error ("Listing source lines requires symbols.");
+ if (!have_full_symbols () && !have_partial_symbols ())
+ error ("No symbol table is loaded. Use the \"file\" command.");
+
+ /* Pull in a current source symtab if necessary */
+ if (current_source_symtab == 0 &&
+ (arg == 0 || arg[0] == '+' || arg[0] == '-'))
+ select_source_symtab (0);
/* "l" or "l +" lists next ten lines. */
- if (arg == 0 || !strcmp (arg, "+"))
+ if (arg == 0 || STREQ (arg, "+"))
{
if (current_source_symtab == 0)
error ("No default source file yet. Do \"help list\".");
print_source_lines (current_source_symtab, current_source_line,
- current_source_line + 10);
+ current_source_line + lines_to_list, 0);
return;
}
/* "l -" lists previous ten lines, the ones before the ten just listed. */
- if (!strcmp (arg, "-"))
+ if (STREQ (arg, "-"))
{
if (current_source_symtab == 0)
error ("No default source file yet. Do \"help list\".");
print_source_lines (current_source_symtab,
- max (first_line_listed - 10, 1),
- first_line_listed);
+ max (first_line_listed - lines_to_list, 1),
+ first_line_listed, 0);
return;
}
dummy_beg = 1;
else
{
- sals = decode_line_1 (&arg1, 0, 0, 0);
+ sals = decode_line_1 (&arg1, 0, 0, 0, 0);
- if (! sals.nelts) return; /* C++ */
- if (sals.nelts != 1)
+ if (!sals.nelts)
+ return; /* C++ */
+ if (sals.nelts > 1)
{
- error ("Unreasonable listing request");
+ ambiguous_line_spec (&sals);
+ xfree (sals.sals);
+ return;
}
sal = sals.sals[0];
- free (sals.sals);
+ xfree (sals.sals);
}
/* Record whether the BEG arg is all digits. */
else
{
if (dummy_beg)
- sals_end = decode_line_1 (&arg1, 0, 0, 0);
+ sals_end = decode_line_1 (&arg1, 0, 0, 0, 0);
else
- sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line);
- if (! sals_end.nelts) return; /* C++ */
+ sals_end = decode_line_1 (&arg1, 0, sal.symtab, sal.line, 0);
+ if (sals_end.nelts == 0)
+ return;
+ if (sals_end.nelts > 1)
+ {
+ ambiguous_line_spec (&sals_end);
+ xfree (sals_end.sals);
+ return;
+ }
sal_end = sals_end.sals[0];
- free (sals_end.sals);
+ xfree (sals_end.sals);
}
}
error ("Specified start and end are in different files.");
if (dummy_beg && dummy_end)
error ("Two empty args do not say what lines to list.");
-
+
/* if line was specified by address,
first print exactly which line, and which file.
In this case, sal.symtab == 0 means address is outside
if (*arg == '*')
{
if (sal.symtab == 0)
- error ("No source file for address 0x%x.", sal.pc);
+ /* FIXME-32x64--assumes sal.pc fits in long. */
+ error ("No source file for address %s.",
+ local_hex_string ((unsigned long) sal.pc));
sym = find_pc_function (sal.pc);
if (sym)
- printf ("0x%x is in %s (%s, line %d).\n",
- sal.pc, SYMBOL_NAME (sym), sal.symtab->filename, sal.line);
+ {
+ print_address_numeric (sal.pc, 1, gdb_stdout);
+ printf_filtered (" is in ");
+ fputs_filtered (SYMBOL_SOURCE_NAME (sym), gdb_stdout);
+ printf_filtered (" (%s:%d).\n", sal.symtab->filename, sal.line);
+ }
else
- printf ("0x%x is in %s, line %d.\n",
- sal.pc, sal.symtab->filename, sal.line);
+ {
+ print_address_numeric (sal.pc, 1, gdb_stdout);
+ printf_filtered (" is at %s:%d.\n",
+ sal.symtab->filename, sal.line);
+ }
}
/* If line was not specified by just a line number,
and it does not imply a symtab, it must be an undebuggable symbol
which means no source code. */
- if (! linenum_beg && sal.symtab == 0)
+ if (!linenum_beg && sal.symtab == 0)
error ("No line number known for %s.", arg);
/* If this command is repeated with RET,
if (dummy_beg && sal_end.symtab == 0)
error ("No default source file yet. Do \"help list\".");
if (dummy_beg)
- print_source_lines (sal_end.symtab, max (sal_end.line - 9, 1),
- sal_end.line + 1);
+ print_source_lines (sal_end.symtab,
+ max (sal_end.line - (lines_to_list - 1), 1),
+ sal_end.line + 1, 0);
else if (sal.symtab == 0)
error ("No default source file yet. Do \"help list\".");
else if (no_end)
- print_source_lines (sal.symtab, max (sal.line - 5, 1), sal.line + 5);
+ {
+ int first_line = sal.line - lines_to_list / 2;
+
+ if (first_line < 1) first_line = 1;
+
+ print_source_lines (sal.symtab, first_line, first_line + lines_to_list,
+ 0);
+ }
else
print_source_lines (sal.symtab, sal.line,
- dummy_end ? sal.line + 10 : sal_end.line + 1);
+ (dummy_end
+ ? sal.line + lines_to_list
+ : sal_end.line + 1),
+ 0);
}
\f
/* Print info on range of pc's in a specified line. */
static void
-line_info (arg, from_tty)
- char *arg;
- int from_tty;
+line_info (char *arg, int from_tty)
{
struct symtabs_and_lines sals;
struct symtab_and_line sal;
- int start_pc, end_pc;
+ CORE_ADDR start_pc, end_pc;
+ int i;
+
+ INIT_SAL (&sal); /* initialize to zeroes */
if (arg == 0)
{
sal.symtab = current_source_symtab;
sal.line = last_line_listed;
+ sals.nelts = 1;
+ sals.sals = (struct symtab_and_line *)
+ xmalloc (sizeof (struct symtab_and_line));
+ sals.sals[0] = sal;
}
else
{
- sals = decode_line_spec (arg);
-
- if (sals.nelts == 0)
- return; /* C++ */
- if (sals.nelts != 1)
- error ("unreasonable line info request");
-
- sal = sals.sals[0];
- free (sals.sals);
- /* If this command is repeated with RET,
- turn it into the no-arg variant. */
+ sals = decode_line_spec_1 (arg, 0);
- if (from_tty)
- *arg = 0;
+ dont_repeat ();
}
- if (sal.symtab == 0)
- error ("No source file specified.");
- if (sal.line > 0
- && find_line_pc_range (sal.symtab, sal.line, &start_pc, &end_pc))
+ /* C++ More than one line may have been specified, as when the user
+ specifies an overloaded function name. Print info on them all. */
+ for (i = 0; i < sals.nelts; i++)
{
- if (start_pc == end_pc)
- printf ("Line %d of \"%s\" is at pc 0x%x but contains no code.\n",
- sal.line, sal.symtab->filename, start_pc);
+ sal = sals.sals[i];
+
+ if (sal.symtab == 0)
+ {
+ printf_filtered ("No line number information available");
+ if (sal.pc != 0)
+ {
+ /* This is useful for "info line *0x7f34". If we can't tell the
+ user about a source line, at least let them have the symbolic
+ address. */
+ printf_filtered (" for address ");
+ wrap_here (" ");
+ print_address (sal.pc, gdb_stdout);
+ }
+ else
+ printf_filtered (".");
+ printf_filtered ("\n");
+ }
+ else if (sal.line > 0
+ && find_line_pc_range (sal, &start_pc, &end_pc))
+ {
+ if (start_pc == end_pc)
+ {
+ printf_filtered ("Line %d of \"%s\"",
+ sal.line, sal.symtab->filename);
+ wrap_here (" ");
+ printf_filtered (" is at address ");
+ print_address (start_pc, gdb_stdout);
+ wrap_here (" ");
+ printf_filtered (" but contains no code.\n");
+ }
+ else
+ {
+ printf_filtered ("Line %d of \"%s\"",
+ sal.line, sal.symtab->filename);
+ wrap_here (" ");
+ printf_filtered (" starts at address ");
+ print_address (start_pc, gdb_stdout);
+ wrap_here (" ");
+ printf_filtered (" and ends at ");
+ print_address (end_pc, gdb_stdout);
+ printf_filtered (".\n");
+ }
+
+ /* x/i should display this line's code. */
+ set_next_address (start_pc);
+
+ /* Repeating "info line" should do the following line. */
+ last_line_listed = sal.line + 1;
+
+ /* If this is the only line, show the source code. If it could
+ not find the file, don't do anything special. */
+ if (annotation_level && sals.nelts == 1)
+ identify_source_line (sal.symtab, sal.line, 0, start_pc);
+ }
else
- printf ("Line %d of \"%s\" starts at pc 0x%x and ends at 0x%x.\n",
- sal.line, sal.symtab->filename, start_pc, end_pc);
- /* x/i should display this line's code. */
- set_next_address (start_pc);
- /* Repeating "info line" should do the following line. */
- last_line_listed = sal.line + 1;
+ /* Is there any case in which we get here, and have an address
+ which the user would want to see? If we have debugging symbols
+ and no line numbers? */
+ printf_filtered ("Line number %d is out of range for \"%s\".\n",
+ sal.line, sal.symtab->filename);
}
- else
- printf ("Line number %d is out of range for \"%s\".\n",
- sal.line, sal.symtab->filename);
+ xfree (sals.sals);
}
\f
/* Commands to search the source file for a regexp. */
+/* ARGSUSED */
static void
-forward_search_command (regex, from_tty)
- char *regex;
+forward_search_command (char *regex, int from_tty)
{
register int c;
register int desc;
register FILE *stream;
- int line = last_line_listed + 1;
+ int line;
char *msg;
+ line = last_line_listed + 1;
+
msg = (char *) re_comp (regex);
if (msg)
error (msg);
- if (current_source_symtab == 0)
- error ("No default source file yet. Do \"help list\".");
-
- /* Search from last_line_listed+1 in current_source_symtab */
+ if (current_source_symtab == 0)
+ select_source_symtab (0);
- desc = openp (source_path, 0, current_source_symtab->filename,
- O_RDONLY, 0, ¤t_source_symtab->fullname);
+ desc = open_source_file (current_source_symtab);
if (desc < 0)
perror_with_name (current_source_symtab->filename);
if (current_source_symtab->line_charpos == 0)
find_source_lines (current_source_symtab, desc);
- if (line < 1 || line >= current_source_symtab->nlines)
+ if (line < 1 || line > current_source_symtab->nlines)
{
close (desc);
error ("Expression not found");
perror_with_name (current_source_symtab->filename);
}
- stream = fdopen (desc, "r");
+ stream = fdopen (desc, FDOPEN_MODE);
clearerr (stream);
- while (1) {
- char buf[4096]; /* Should be reasonable??? */
- register char *p = buf;
-
- c = fgetc (stream);
- if (c == EOF)
- break;
- do {
- *p++ = c;
- } while (c != '\n' && (c = fgetc (stream)) >= 0);
-
- /* we now have a source line in buf, null terminate and match */
- *p = 0;
- if (re_exec (buf) > 0)
- {
- /* Match! */
- fclose (stream);
- print_source_lines (current_source_symtab,
- line, line+1);
- current_source_line = max (line - 5, 1);
- return;
- }
- line++;
- }
+ while (1)
+ {
+ static char *buf = NULL;
+ register char *p;
+ int cursize, newsize;
+
+ cursize = 256;
+ buf = xmalloc (cursize);
+ p = buf;
- printf ("Expression not found\n");
+ c = getc (stream);
+ if (c == EOF)
+ break;
+ do
+ {
+ *p++ = c;
+ if (p - buf == cursize)
+ {
+ newsize = cursize + cursize / 2;
+ buf = xrealloc (buf, newsize);
+ p = buf + cursize;
+ cursize = newsize;
+ }
+ }
+ while (c != '\n' && (c = getc (stream)) >= 0);
+
+#ifdef CRLF_SOURCE_FILES
+ /* Remove the \r, if any, at the end of the line, otherwise
+ regular expressions that end with $ or \n won't work. */
+ if (p - buf > 1 && p[-2] == '\r')
+ {
+ p--;
+ p[-1] = '\n';
+ }
+#endif
+
+ /* we now have a source line in buf, null terminate and match */
+ *p = 0;
+ if (re_exec (buf) > 0)
+ {
+ /* Match! */
+ fclose (stream);
+ print_source_lines (current_source_symtab, line, line + 1, 0);
+ set_internalvar (lookup_internalvar ("_"),
+ value_from_longest (builtin_type_int,
+ (LONGEST) line));
+ current_source_line = max (line - lines_to_list / 2, 1);
+ return;
+ }
+ line++;
+ }
+
+ printf_filtered ("Expression not found\n");
fclose (stream);
}
+/* ARGSUSED */
static void
-reverse_search_command (regex, from_tty)
- char *regex;
+reverse_search_command (char *regex, int from_tty)
{
register int c;
register int desc;
register FILE *stream;
- int line = last_line_listed - 1;
+ int line;
char *msg;
+ line = last_line_listed - 1;
+
msg = (char *) re_comp (regex);
if (msg)
error (msg);
- if (current_source_symtab == 0)
- error ("No default source file yet. Do \"help list\".");
-
- /* Search from last_line_listed-1 in current_source_symtab */
+ if (current_source_symtab == 0)
+ select_source_symtab (0);
- desc = openp (source_path, 0, current_source_symtab->filename,
- O_RDONLY, 0, ¤t_source_symtab->fullname);
+ desc = open_source_file (current_source_symtab);
if (desc < 0)
perror_with_name (current_source_symtab->filename);
if (current_source_symtab->line_charpos == 0)
find_source_lines (current_source_symtab, desc);
- if (line < 1 || line >= current_source_symtab->nlines)
+ if (line < 1 || line > current_source_symtab->nlines)
{
close (desc);
error ("Expression not found");
perror_with_name (current_source_symtab->filename);
}
- stream = fdopen (desc, "r");
+ stream = fdopen (desc, FDOPEN_MODE);
clearerr (stream);
- while (1)
+ while (line > 1)
{
+/* FIXME!!! We walk right off the end of buf if we get a long line!!! */
char buf[4096]; /* Should be reasonable??? */
register char *p = buf;
- c = fgetc (stream);
+ c = getc (stream);
if (c == EOF)
break;
- do {
- *p++ = c;
- } while (c != '\n' && (c = fgetc (stream)) >= 0);
+ do
+ {
+ *p++ = c;
+ }
+ while (c != '\n' && (c = getc (stream)) >= 0);
+
+#ifdef CRLF_SOURCE_FILES
+ /* Remove the \r, if any, at the end of the line, otherwise
+ regular expressions that end with $ or \n won't work. */
+ if (p - buf > 1 && p[-2] == '\r')
+ {
+ p--;
+ p[-1] = '\n';
+ }
+#endif
/* We now have a source line in buf; null terminate and match. */
*p = 0;
{
/* Match! */
fclose (stream);
- print_source_lines (current_source_symtab,
- line, line+1);
- current_source_line = max (line - 5, 1);
+ print_source_lines (current_source_symtab, line, line + 1, 0);
+ set_internalvar (lookup_internalvar ("_"),
+ value_from_longest (builtin_type_int,
+ (LONGEST) line));
+ current_source_line = max (line - lines_to_list / 2, 1);
return;
}
line--;
}
}
- printf ("Expression not found\n");
+ printf_filtered ("Expression not found\n");
fclose (stream);
return;
}
\f
-static
-initialize ()
+void
+_initialize_source (void)
{
+ struct cmd_list_element *c;
current_source_symtab = 0;
init_source_path ();
- add_com ("directory", class_files, directory_command,
- "Add directory DIR to end of search path for source files.\n\
-With no argument, reset the search path to just the working directory\n\
-and forget cached info on line positions in source files.");
+ /* The intention is to use POSIX Basic Regular Expressions.
+ Always use the GNU regex routine for consistency across all hosts.
+ Our current GNU regex.c does not have all the POSIX features, so this is
+ just an approximation. */
+ re_set_syntax (RE_SYNTAX_GREP);
+
+ c = add_cmd ("directory", class_files, directory_command,
+ "Add directory DIR to beginning of search path for source files.\n\
+Forget cached info on source file locations and line positions.\n\
+DIR can also be $cwd for the current working directory, or $cdir for the\n\
+directory in which the source file was compiled into object code.\n\
+With no argument, reset the search path to $cdir:$cwd, the default.",
+ &cmdlist);
- add_info ("directories", directories_info,
- "Current search path for finding source files.");
+ if (dbx_commands)
+ add_com_alias ("use", "directory", class_files, 0);
+
+ set_cmd_completer (c, filename_completer);
+
+ add_cmd ("directories", no_class, show_directories,
+ "Current search path for finding source files.\n\
+$cwd in the path means the current working directory.\n\
+$cdir in the path means the compilation directory of the source file.",
+ &showlist);
+
+ if (xdb_commands)
+ {
+ add_com_alias ("D", "directory", class_files, 0);
+ add_cmd ("ld", no_class, show_directories,
+ "Current search path for finding source files.\n\
+$cwd in the path means the current working directory.\n\
+$cdir in the path means the compilation directory of the source file.",
+ &cmdlist);
+ }
+
+ add_info ("source", source_info,
+ "Information about the current source file.");
add_info ("line", line_info,
- "Core addresses of the code for a source line.\n\
+ concat ("Core addresses of the code for a source line.\n\
Line can be specified as\n\
LINENUM, to list around that line in current file,\n\
FILE:LINENUM, to list around that line in that file,\n\
FUNCTION, to list around beginning of that function,\n\
FILE:FUNCTION, to distinguish among like-named static functions.\n\
+", "\
Default is to describe the last source line that was listed.\n\n\
This sets the default address for \"x\" to the line's first instruction\n\
so that \"x/i\" suffices to start examining the machine code.\n\
-The address is also stored as the value of \"$_\".");
+The address is also stored as the value of \"$_\".", NULL));
add_com ("forward-search", class_files, forward_search_command,
- "Search for regular expression (see regex(3)) from last line listed.");
+ "Search for regular expression (see regex(3)) from last line listed.\n\
+The matching line number is also stored as the value of \"$_\".");
add_com_alias ("search", "forward-search", class_files, 0);
add_com ("reverse-search", class_files, reverse_search_command,
- "Search backward for regular expression (see regex(3)) from last line listed.");
+ "Search backward for regular expression (see regex(3)) from last line listed.\n\
+The matching line number is also stored as the value of \"$_\".");
+
+ if (xdb_commands)
+ {
+ add_com_alias ("/", "forward-search", class_files, 0);
+ add_com_alias ("?", "reverse-search", class_files, 0);
+ }
add_com ("list", class_files, list_command,
- "List specified function or line.\n\
+ concat ("List specified function or line.\n\
With no argument, lists ten more lines after or around previous listing.\n\
\"list -\" lists the ten lines before a previous ten-line listing.\n\
One argument specifies a line, and ten lines are listed around that line.\n\
Two arguments with comma between specify starting and ending lines to list.\n\
+", "\
Lines can be specified in these ways:\n\
LINENUM, to list around that line in current file,\n\
FILE:LINENUM, to list around that line in that file,\n\
FUNCTION, to list around beginning of that function,\n\
FILE:FUNCTION, to distinguish among like-named static functions.\n\
*ADDRESS, to list around the line containing that address.\n\
-With two args if one is empty it stands for ten lines away from the other arg.");
-}
+With two args if one is empty it stands for ten lines away from the other arg.", NULL));
+
+ if (!xdb_commands)
+ add_com_alias ("l", "list", class_files, 1);
+ else
+ add_com_alias ("v", "list", class_files, 1);
-END_FILE
+ if (dbx_commands)
+ add_com_alias ("file", "list", class_files, 1);
+
+ add_show_from_set
+ (add_set_cmd ("listsize", class_support, var_uinteger,
+ (char *) &lines_to_list,
+ "Set number of source lines gdb will list by default.",
+ &setlist),
+ &showlist);
+}
projects / binutils.git / blobdiff